Seizure (3)
'seizure' is the definition.
(fit is a kind of seizure)
This is all the clue.
(Other definitions for fit that I've seen before include "In trim" , "Blend in" , "Suitable; sudden attack" , "Paroxysm" , "In good physical shape 93)" .)
'seizure' is the definition.
(I know that expropriation is a type of arrogation)
This is the entire clue.
(Other definitions for expropriation that I've seen before include "Commandeering" , "Taking (of property) for public use" .)